Survival

live on a Sky Island

Sky islands are isolated mountains surrounded by radically different lowland environments. The term originally referred to those found near the southern borders of the U.S. states of Arizona and New Mexico with the northern borders of the Mexican States of Chihuahua and Sonora such as the Dragoon Mountains featured in this post. The isolation has significant implications for these natural habitats. The American Southwest region began warming up between ∼20,000–10,000 years before the present-day and atmospheric temperatures increased substantially, resulting in the formation of vast deserts that isolated the sky islands.

This sycamore tree survives life in this ephemeral stream of an Arizona “Sky Island” by allowing entire trunks to die off during extended dry spells. The tree is an Arizona Sycamore (Platanus wrightii).

Informative sign at campsite

Reference: wikipedia article “Sky Islands.”

Copyright 2022 Michael Stephen Wills All Rights Reserved

Cochise Spring

ancestral Apache land

Interstate 10 between Benson and Wilcox ascends through a field of enormous, eroded granite boulders. Off to the west are the Dragoon Mountains, otherwise known as “Cochise Stronghold.”

Informative sign at campsite

Starting from the campsite is the “Sky Islands Traverse” hiking trail, leading up into the mountains. I wandered from the trail to follow a dry streambed to this residual pool of water, the time being early spring, and this is what remained from the winter rains.

A single butterfly of the genus Anthocharis generally called “Orangetip” for the colorful upper wing tips. These exist throughout the world, here in Arizona they migrate across the desert, obtaining refuge and nourishment from “Sky Islands” such as the Dragoon Mountains

Copyright 2022 Michael Stephen Wills All Rights Reserved